What’s Vulnerable › Vulnerabilities

CVE-2025-38315: Bluetooth: btintel: Check dsbr size from EFI variable

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-10 · updated 2026-06-17
• Weakness: CWE-674

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel: Check dsbr size from EFI variable Since the size of struct btintel_dsbr is already known, we can just start there instead of querying the EFI variable size. If the final result doesn't match what we expect also fail. This fixes a stack buffer overflow when the EFI variable is larger than struct btintel_dsbr.

Affected products

• Linux kernel: from 6.11.1 before 6.12.34; from 6.13 before 6.15.3; 6.11, 6.11-rc6, 6.11-rc7 — fixed in 6.12.34, 6.15.3

How to fix

Upgrade to a fixed version: Linux kernel 6.12.34, 6.15.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3aa1dc3c9060e335e82e9c182bf3d1db29220b1b
• https://git.kernel.org/stable/c/7b8526bb489780ccc0caffc446ecabec83cfe568
• https://git.kernel.org/stable/c/9427f6081f37c795a8bd29d0ee72a4da3bd64af8

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